Answer:
Alvin: 49
Elga: 40
Step-by-step explanation:
- The equation is 89 = x + (x-9).
- Remove the parenthesis and combine the like terms. 89 = 2x - 9
- Add 9 on both sides. 98 = 2x
- Divide by 2 on both sides. x = 49
- 49 is the age of Alvin. (49-9) 40 is the age of Elga.
It is C (2, 1) I think it is because they intersect
Answer:
Part A
x = liters (the milk and water)
0.2 x + 1 = x
Part B
0.2 x + 1 = x
0.8 x = 1
x = 1 : 0.8 = 1.25 liters
Milk
1.25 x 0.2 = 0.25
